* uninline simple_strntoull(),
gcc overinlines and this function is not performance critical
* reorder arguments, so that appending INT_MAX as 4th argument
generates very efficient tail call
Space savings:
add/remove: 1/0 grow/shrink: 0/3 up/down: 27/-179 (-152)
Function old new delta
simple_strntoll - 27 +27
simple_strtoull 15 10 -5
simple_strtoll 41 7 -34
vsscanf 1930 1790 -140
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/all/82a2af6e-9b6c-4a09-89d7-ca90cc1cdad1@p183/
Commit 0f71dcfb4a ("powerpc/ftrace: Add support for
-fpatchable-function-entry") added a script to check for
-fpatchable-function-entry compiler support. The script expects compiler
to emit the section __patchable_function_entries and few nops after a
function entry.
If the compiler understands and emits the above,
CONFIG_ARCH_USING_PATCHABLE_FUNCTION_ENTRY is set.
So teach dummy-tools' gcc about this.
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Instead of checking for the specific error codes, replace
devm_gpiod_get_index() with devm_gpiod_get_index_optional().
In this case we just return all errors to the caller and
simply check for NULL in case if legacy GPIO is being used.
As the result the code is easier to read and maintain.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20231016161005.1471768-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Lee Jones <lee@kernel.org>
The of.h is used as a proxy to mod_devicetable, replace former by
latter.
The commit 2d6180147e ("leds: gpio: Configure per-LED pin control")
added yet another unneeded OF APIs. Replace with direct use of fwnode.
Altogether this makes driver agnostic to the firmware interface in use.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20231016161005.1471768-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Lee Jones <lee@kernel.org>
The standard conditional pattern is to check for errors first and
bail out if any. Refactor led_update_brightness() accordingly.
While at it, drop unneeded assignment and return 0 unconditionally
on success.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Denis Osterland-Heim <denis.osterland@diehl.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20231016153051.1409074-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Lee Jones <lee@kernel.org>
I have improperly refactored commits
4d5ed2621c24 ("leds: turris-omnia: Make set_brightness() more efficient")
and
aaf38273cf76 ("leds: turris-omnia: Support HW controlled mode via private trigger")
after Lee requested a change in API semantics of the new functions I
introduced in commit
28350bc0ac77 ("leds: turris-omnia: Do not use SMBUS calls").
Before the change, the function omnia_cmd_write_u8() returned 0 on
success, and afterwards it returned a positive value (number of bytes
written). The latter version was applied, but the following commits did
not properly account for this change.
This results in non-functional LED's .brightness_set_blocking() and
trigger's .activate() methods.
The main reasoning behind the semantics change was that read/write
methods should return the number of read/written bytes on success.
It was pointed to me [1] that this is not always true (for example the
regmap API does not do so), and since the driver never uses this number
of read/written bytes information, I decided to fix this issue by
changing the functions to the original semantics (return 0 on success).
[1] https://lore.kernel.org/linux-gpio/ZQnn+Gi0xVlsGCYA@smile.fi.intel.com/
Fixes: 28350bc0ac77 ("leds: turris-omnia: Do not use SMBUS calls")
Signed-off-by: Marek Behún <kabel@kernel.org>
Link: https://lore.kernel.org/r/20231016141538.30037-1-kabel@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
Move the mutex_init() to avoid redundant mutex_destroy() calls after
that for each time the probe fails.
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Link: https://lore.kernel.org/r/20231013022010.854367-1-chunyan.zhang@unisoc.com
Signed-off-by: Lee Jones <lee@kernel.org>
GCC 13.2 complains about array subscript 17 is above array bounds of
'char[16]' with IFNAMSIZ set to 16.
The warning is correct but this scenario is impossible.
set_device_name is called by device_name_store (store sysfs entry) and
netdev_trig_activate.
device_name_store already check if size is >= of IFNAMSIZ and return
-EINVAL. (making the warning scenario impossible)
netdev_trig_activate works on already defined interface, where the name
has already been checked and should already follow the condition of
strlen() < IFNAMSIZ.
Aside from the scenario being impossible, set_device_name can be
improved to both mute the warning and make the function safer.
To make it safer, move size check from device_name_store directly to
set_device_name and prevent any out of bounds scenario.
Cc: stable@vger.kernel.org
Fixes: 28a6a2ef18 ("leds: trigger: netdev: refactor code setting device name")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202309192035.GTJEEbem-lkp@intel.com/
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Link: https://lore.kernel.org/r/20231007131042.15032-1-ansuelsmth@gmail.com
Signed-off-by: Lee Jones <lee@kernel.org>
Document Kinetic KTD2026/2027 LED driver devicetree bindings.
Signed-off-by: André Apitzsch <git@apitzsch.eu>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231002-ktd202x-v6-1-26be8eefeb88@apitzsch.eu
Signed-off-by: Lee Jones <lee@kernel.org>
The colors are already part of DT bindings. Make sure the kernel is
able to convert them to strings.
Signed-off-by: Ondrej Jirman <megi@xff.cz>
Link: https://lore.kernel.org/r/20231008144014.1180334-1-megi@xff.cz
Signed-off-by: Lee Jones <lee@kernel.org>
Increase the limit to match available values in dt-bindings/leds/common.h
Fixes: 472d7b9e81 ("dt-bindings: leds: Expand LED_COLOR_ID definitions")
Signed-off-by: Ondrej Jirman <megi@xff.cz>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20231008142103.1174028-1-megi@xff.cz
Signed-off-by: Lee Jones <lee@kernel.org>
First of all, the fixed GPIO base is source of troubles and
it doesn't scale. Second, there is no in-kernel user of this
base, so drop it.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20231002135629.2605462-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Lee Jones <lee@kernel.org>
The maple tree register cache is based on a much more modern data structure
than the rbtree cache and makes optimisation choices which are probably
more appropriate for modern systems than those made by the rbtree cache.
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230929-leds-maple-v1-4-ba5f9dcb1e75@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
The maple tree register cache is based on a much more modern data structure
than the rbtree cache and makes optimisation choices which are probably
more appropriate for modern systems than those made by the rbtree cache.
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230929-leds-maple-v1-3-ba5f9dcb1e75@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
The maple tree register cache is based on a much more modern data structure
than the rbtree cache and makes optimisation choices which are probably
more appropriate for modern systems than those made by the rbtree cache.
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230929-leds-maple-v1-2-ba5f9dcb1e75@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
The maple tree register cache is based on a much more modern data structure
than the rbtree cache and makes optimisation choices which are probably
more appropriate for modern systems than those made by the rbtree cache.
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230929-leds-maple-v1-1-ba5f9dcb1e75@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
By providing a GPIO line as "trigger-sources" in the FWNODE
(such as from the device tree) and combining with the
GPIO trigger, we can support a GPIO LED trigger in a natural
way from the hardware description instead of using the
custom sysfs and deprecated global GPIO numberspace.
Example:
gpio: gpio@0 {
compatible "my-gpio";
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
#interrupt-cells = <2>;
#trigger-source-cells = <2>;
};
leds {
compatible = "gpio-leds";
led-my-gpio {
label = "device:blue:myled";
gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
default-state = "off";
linux,default-trigger = "gpio";
trigger-sources = <&gpio 1 GPIO_ACTIVE_HIGH>;
};
};
Make this the norm, unmark the driver as broken.
Delete the sysfs handling of GPIOs.
Since GPIO descriptors inherently can describe inversion,
the inversion handling can just be deleted.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230926-gpio-led-trigger-dt-v2-3-e06e458b788e@linaro.org
Signed-off-by: Lee Jones <lee@kernel.org>
Some cleanups:
* Remove the trailing comma in the terminator entry for the OF
table making code robust against (theoretical) misrebases or other
similar things where the new entry goes _after_ the termination without
the compiler noticing.
* Drop a space from terminator entry for ID table.
While at it, move OF/ID table near to the user.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230923171921.53503-3-biju.das.jz@bp.renesas.com
Signed-off-by: Lee Jones <lee@kernel.org>
Convert enum->pointer for data in the match tables, so that
device_get_match_data() can do match against OF/ACPI/I2C tables, once i2c
bus type match support added to it.
Replace enum->struct *pca955x_chipdefs for data in the match table.
Simplify the probe() by replacing device_get_match_data() and ID lookup
for retrieving data by i2c_get_match_data().
While at it, add const definition to pca955x_chipdefs[].
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230923171921.53503-2-biju.das.jz@bp.renesas.com
Signed-off-by: Lee Jones <lee@kernel.org>
`strncpy` is deprecated for use on NUL-terminated destination strings
[1] and as such we should prefer more robust and less ambiguous string
interfaces.
We expect `dest` to be NUL-terminated due to its use with dev_err.
lp3952_get_label()'s dest argument is priv->leds[i].name:
| acpi_ret = lp3952_get_label(&priv->client->dev, led_name_hdl[i],
| priv->leds[i].name);
... which is then assigned to:
| priv->leds[i].cdev.name = priv->leds[i].name;
... which is used with a format string
| dev_err(&priv->client->dev,
| "couldn't register LED %s\n",
| priv->leds[i].cdev.name);
There is no indication that NUL-padding is required but if it is let's
opt for strscpy_pad.
Considering the above, a suitable replacement is `strscpy` [2] due to
the fact that it guarantees NUL-termination on the destination buffer
without unnecessarily NUL-padding.
Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1]
Link: https://manpages.debian.org/testing/linux-manual-4.8/strscpy.9.en.html [2]
Link: https://github.com/KSPP/linux/issues/90
Signed-off-by: Justin Stitt <justinstitt@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230922-strncpy-drivers-leds-leds-lp3952-c-v1-1-4941d6f60ca4@google.com
Signed-off-by: Lee Jones <lee@kernel.org>
In order to teach the compiler that 'trig->name' will never be truncated,
we need to tell it that 'cpu' is not negative.
When building with W=1, this fixes the following warnings:
drivers/leds/trigger/ledtrig-cpu.c: In function ‘ledtrig_cpu_init’:
drivers/leds/trigger/ledtrig-cpu.c:155:56: error: ‘%d’ directive output may be truncated writing between 1 and 11 bytes into a region of size 5 [-Werror=format-truncation=]
155 | snprintf(trig->name, MAX_NAME_LEN, "cpu%d", cpu);
| ^~
drivers/leds/trigger/ledtrig-cpu.c:155:52: note: directive argument in the range [-2147483648, 7]
155 | snprintf(trig->name, MAX_NAME_LEN, "cpu%d", cpu);
| ^~~~~~~
drivers/leds/trigger/ledtrig-cpu.c:155:17: note: ‘snprintf’ output between 5 and 15 bytes into a destination of size 8
155 | snprintf(trig->name, MAX_NAME_LEN, "cpu%d", cpu);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Fixes: 8f88731d05 ("led-triggers: create a trigger for CPU activity")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/3f4be7a99933cf8566e630da54f6ab913caac432.1695453322.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Lee Jones <lee@kernel.org>
Disabling a PWM (i.e. calling pwm_apply_state with .enabled = false)
gives no guarantees what the PWM output does. It might freeze where it
currently is, or go in a High-Z state or drive the active or inactive
state, it might even continue to toggle.
To ensure that the LED gets really disabled, don't disable the PWM even
when .duty_cycle is zero.
This fixes disabling a leds-pwm LED on i.MX28. The PWM on this SoC is
one of those that freezes its output on disable, so if you disable an
LED that is full on, it stays on. If you disable a LED with half
brightness it goes off in 50% of the cases and full on in the other 50%.
Fixes: 41c42ff5db ("leds: simple driver for pwm driven LEDs")
Reported-by: Rogan Dawes <rogan@dawes.za.net>
Reported-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Fabio Estevam <festevam@denx.de>
Link: https://lore.kernel.org/r/20230922192834.1695727-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Lee Jones <lee@kernel.org>
If the MCU on Turris Omnia is running newer firmware versions, the LED
controller supports RGB gamma correction (and enables it by default for
newer boards).
Determine whether the gamma correction setting feature is supported and
add the ability to set it via sysfs attribute file.
Signed-off-by: Marek Behún <kabel@kernel.org>
Link: https://lore.kernel.org/r/20230918161104.20860-5-kabel@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
Add support for enabling MCU controlled mode of the Turris Omnia LEDs
via a LED private trigger called "omnia-mcu". Recall that private LED
triggers will only be listed in the sysfs trigger file for LEDs that
support them (currently there is no user of this mechanism).
When in MCU controlled mode, the user can still set LED color, but the
blinking is done by MCU, which does different things for different LEDs:
- WAN LED is blinked according to the LED[0] pin of the WAN PHY
- LAN LEDs are blinked according to the LED[0] output of the
corresponding port of the LAN switch
- PCIe LEDs are blinked according to the logical OR of the MiniPCIe port
LED pins
In the future I want to make the netdev trigger to transparently offload
the blinking to the HW if user sets compatible settings for the netdev
trigger (for LEDs associated with network devices).
There was some work on this already, and hopefully we will be able to
complete it sometime, but for now there are still multiple blockers for
this, and even if there weren't, we still would not be able to configure
HW controlled mode for the LEDs associated with MiniPCIe ports.
In the meantime let's support HW controlled mode via the private LED
trigger mechanism. If, in the future, we manage to complete the netdev
trigger offloading, we can still keep this private trigger for backwards
compatibility, if needed.
We also set "omnia-mcu" to cdev->default_trigger, so that the MCU keeps
control until the user first wants to take over it. If a different
default trigger is specified in device-tree via the
'linux,default-trigger' property, LED class will overwrite
cdev->default_trigger, and so the DT property will be respected.
Signed-off-by: Marek Behún <kabel@kernel.org>
Link: https://lore.kernel.org/r/20230918161104.20860-4-kabel@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
Implement caching of the LED color and state values that are sent to MCU
in order to make the set_brightness() operation more efficient by
avoiding I2C transactions which are not needed.
On Turris Omnia's MCU, which acts as the RGB LED controller, each LED
has a RGB color, and a ON/OFF state, which are configurable via I2C
commands CMD_LED_COLOR and CMD_LED_STATE.
The CMD_LED_COLOR command sends 5 bytes and the CMD_LED_STATE command 2
bytes over the I2C bus, which operates at 100 kHz. With I2C overhead
this allows ~1670 color changing commands and ~3200 state changing
commands per second (or around 1000 color + state changes per second).
This may seem more than enough, but the issue is that the I2C bus is
shared with another peripheral, the MCU. The MCU exposes an interrupt
interface, and it can trigger hundreds of interrupts per second. Each
time, we need to read the interrupt state register over this I2C bus.
Whenever we are sending a LED color/state changing command, the
interrupt reading is waiting.
Currently, every time LED brightness or LED multi intensity is changed,
we send a CMD_LED_STATE command, and if the computed color (brightness
adjusted multi_intensity) is non-zero, we also send a CMD_LED_COLOR
command.
Consider for example the situation when we have a netdev trigger enabled
for a LED. The netdev trigger does not change the LED color, only the
brightness (either to 0 or to currently configured brightness), and so
there is no need to send the CMD_LED_COLOR command. But each change of
brightness to 0 sends one CMD_LED_STATE command, and each change of
brightness to max_brightness sends one CMD_LED_STATE command and one
CMD_LED_COLOR command:
set_brightness(0) -> CMD_LED_STATE
set_brightness(255) -> CMD_LED_STATE + CMD_LED_COLOR
(unnecessary)
We can avoid the unnecessary I2C transactions if we cache the values of
state and color that are sent to the controller. If the color does not
change from the one previously sent, there is no need to do the
CMD_LED_COLOR I2C transaction, and if the state does not change, there
is no need to do the CMD_LED_STATE transaction.
Because we need to make sure that our cached values are consistent with
the controller state, add explicit setting of the LED color to white at
probe time (this is the default setting when MCU resets, but does not
necessarily need to be the case, for example if U-Boot played with the
LED colors).
Signed-off-by: Marek Behún <kabel@kernel.org>
Link: https://lore.kernel.org/r/20230918161104.20860-3-kabel@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
The leds-turris-omnia driver uses three function for I2C access:
- i2c_smbus_write_byte_data() and i2c_smbus_read_byte_data(), which
cause an emulated SMBUS transfer,
- i2c_master_send(), which causes an ordinary I2C transfer.
The Turris Omnia MCU LED controller is not semantically SMBUS, it
operates as a simple I2C bus. It does not implement any of the SMBUS
specific features, like PEC, or procedure calls, or anything. Moreover
the I2C controller driver also does not implement SMBUS, and so the
emulated SMBUS procedure from drivers/i2c/i2c-core-smbus.c is used for
the SMBUS calls, which gives an unnecessary overhead.
When I first wrote the driver, I was unaware of these facts, and I
simply used the first function that worked.
Drop the I2C SMBUS calls and instead use simple I2C transfers.
Fixes: 089381b27a ("leds: initial support for Turris Omnia LEDs")
Signed-off-by: Marek Behún <kabel@kernel.org>
Link: https://lore.kernel.org/r/20230918161104.20860-2-kabel@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
Use gpiod_set_value_cansleep in the init_device function. Without this
change, the driver may print a warning if the LP55xx enable pin is
connected to a GPIO chip which can sleep (e.g. a GPIO expander):
WARNING: CPU: 0 PID: 2719 at drivers/gpio/gpiolib.c:3051 gpiod_set_value+0x64/0xbc
Signed-off-by: Stefan Eichenberger <eichest@gmail.com>
Link: https://lore.kernel.org/r/20230918143238.75600-1-eichest@gmail.com
Signed-off-by: Lee Jones <lee@kernel.org>
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).
As found with Coccinelle[1], add __counted_by for struct mt6370_priv.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230915201051.never.429-kees@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).
As found with Coccinelle[1], add __counted_by for struct mt6360_priv.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20230915201020.never.433-kees@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.
To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new() which already returns void. Eventually after all drivers
are converted, .remove_new() is renamed to .remove().
All platform drivers below drivers/leds/ unconditionally return zero in
their remove callback and so can be converted trivially to the variant
returning void.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230917130947.1122198-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Lee Jones <lee@kernel.org>
The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.
Make simatic_ipc_leds_gpio_remove() return void instead of returning
zero unconditionally. After that the three remove callbacks that use
this function were trivial to convert to return void, too.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230916164516.1063380-1-u.kleine-koenig@pengutronix.de
Signed-off-by: Lee Jones <lee@kernel.org>
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).
As found with Coccinelle[1], add __counted_by for struct lpg_led.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230915201059.never.086-kees@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).
As found with Coccinelle[1], add __counted_by for struct lm3697.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230915201010.never.399-kees@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).
As found with Coccinelle[1], add __counted_by for struct gpio_leds_priv.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230915201003.never.148-kees@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).
As found with Coccinelle[1], add __counted_by for struct el15203000.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230915200955.never.871-kees@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).
As found with Coccinelle[1], add __counted_by for struct cr0014114.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230915200948.never.728-kees@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).
As found with Coccinelle[1], add __counted_by for struct aw200xx.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20230915200938.never.767-kees@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
When building with clang 18 I see the following warning:
| drivers/leds/leds-pca955x.c:487:15: warning: cast to smaller integer
| type 'enum pca955x_type' from 'const void *' [-Wvoid-pointer-to-enum-cast]
| 487 | chip_type = (enum pca955x_type)md;
This is due to the fact that `md` is a void* while `enum pca995x_type` has the
size of an int.
Add uintptr_t cast to silence clang warning while also keeping enum cast
for readability and consistency with other `chip_type` assignment just a
few lines below:
| chip_type = (enum pca955x_type)id->driver_data;
Reported-by: Nathan Chancellor <nathan@kernel.org>
Closes: https://github.com/ClangBuiltLinux/linux/issues/1910
Signed-off-by: Justin Stitt <justinstitt@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20230816-void-drivers-leds-leds-pca955x-v1-1-2967e4c1bdcc@google.com
Signed-off-by: Lee Jones <lee@kernel.org>
There is no reason why the GPIO resource offsets should not be const.
Mark them accordingly and update a qualifier in struct lpc_ich_gpio_info
definition.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20231024160650.3898959-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Lee Jones <lee@kernel.org>
Rename the SPMI device helper which is used to lookup a device from its
OF node as spmi_find_device_by_of_node() so that it reflects the
implementation and matches how other helpers like this are named.
This will specifically make it more clear that this is a lookup function
which returns a reference counted structure.
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20231003152927.15000-6-johan+linaro@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
Add a comment documenting that the spmi_device_from_of() takes a
reference to the embedded struct device that needs to be dropped after
use.
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20231003152927.15000-5-johan+linaro@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
The Arm Ltd board bindings are a bit unusual in that they define child
nodes for various syscon's. The schemas are also incomplete as they lack
constraints on having additional properties and some properties are
missing. As the bindings for the different platforms only vary by
compatibles, combine them into a single schema doc.
Add the "arm,im-pd1-syscon" compatible which was not documented. Add
"ranges", "#address-cells", and "#size-cells properties which were
missing.
With this, fix the error exposed in the register-bit-led binding.
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20231020142252.3113716-2-robh@kernel.org
Signed-off-by: Lee Jones <lee@kernel.org>
